diff --git a/libs/langgraph/langgraph/pregel/__init__.py b/libs/langgraph/langgraph/pregel/__init__.py
index cb0a89a79..4711965f6 100644
--- a/libs/langgraph/langgraph/pregel/__init__.py
+++ b/libs/langgraph/langgraph/pregel/__init__.py
@@ -127,7 +127,7 @@ from langgraph.utils.queue import AsyncQueue, SyncQueue  # type: ignore[attr-def
 try:
     from langchain_core.tracers._streaming import _StreamingCallbackHandler
 except ImportError:
-    _StreamingCallbackHandler = None
+    _StreamingCallbackHandler = None  # type: ignore
 
 WriteValue = Union[Callable[[Input], Output], Any]
 
@@ -2536,7 +2536,7 @@ class Pregel(PregelProtocol):
         do_stream = (
             next(
                 (
-                    cast(_StreamingCallbackHandler, h)  # type: ignore
+                    cast(_StreamingCallbackHandler, h)
                     for h in run_manager.handlers
                     if isinstance(h, _StreamingCallbackHandler)
                 ),
diff --git a/libs/langgraph/langgraph/pregel/messages.py b/libs/langgraph/langgraph/pregel/messages.py
index d53598220..5766c2b63 100644
--- a/libs/langgraph/langgraph/pregel/messages.py
+++ b/libs/langgraph/langgraph/pregel/messages.py
@@ -23,7 +23,7 @@ from langgraph.types import StreamChunk
 try:
     from langchain_core.tracers._streaming import _StreamingCallbackHandler
 except ImportError:
-    _StreamingCallbackHandler = object
+    _StreamingCallbackHandler = object  # type: ignore
 
 T = TypeVar("T")
 Meta = tuple[tuple[str, ...], dict[str, Any]]
diff --git a/libs/langgraph/langgraph/utils/runnable.py b/libs/langgraph/langgraph/utils/runnable.py
index f51da12d9..4dab44023 100644
--- a/libs/langgraph/langgraph/utils/runnable.py
+++ b/libs/langgraph/langgraph/utils/runnable.py
@@ -56,7 +56,7 @@ from langgraph.utils.config import (
 try:
     from langchain_core.tracers._streaming import _StreamingCallbackHandler
 except ImportError:
-    _StreamingCallbackHandler = None
+    _StreamingCallbackHandler = None  # type: ignore
 
 
 def _set_config_context(
@@ -690,7 +690,7 @@ class RunnableSeq(Runnable):
             if _StreamingCallbackHandler is not None and (
                 stream_handler := next(
                     (
-                        cast(_StreamingCallbackHandler, h)  # type: ignore
+                        cast(_StreamingCallbackHandler, h)
                         for h in run_manager.handlers
                         if isinstance(h, _StreamingCallbackHandler)
                     ),
@@ -758,7 +758,7 @@ class RunnableSeq(Runnable):
                 if _StreamingCallbackHandler is not None and (
                     stream_handler := next(
                         (
-                            cast(_StreamingCallbackHandler, h)  # type: ignore
+                            cast(_StreamingCallbackHandler, h)
                             for h in run_manager.handlers
                             if isinstance(h, _StreamingCallbackHandler)
                         ),